"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
|6793115||Hand tool with vocal function|
The vocal circuit for a hand tool includes a circuit board, a switch connected with the circuit board, and a chip and a speaker installed on the circuit board. The hand tool may be a gas-burning soldering device including a fuel reservoir, a soldering iron subject t...
|5412178||Iron-tip temperature detector of electric soldering iron|
A contact point of a thermocouple sensor is welded to the nose of an iron tip of an electric soldering iron, and sensor wires of the sensor are laid along the surface of the iron tip through a groove to a columnar base of the iron tip. The columnar base o...